- Jan 2, 2006
Does it have a vin? There will be either an A or Y or 9 for the engine code of what originally came in the car. I believe 1986 used the ecm in the ac system like the 87-88 models did but not 100% sure. I do know 86 started out with 198 compressors and switched over to the 622 later in the model year but unsure of the control setups.